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LXT974A

Fast Ethernet 10/100 Quad Transceivers

Intel 

Fast Ethernet 10/100 Quad Transceivers — LXT974/LXT975

Figure 36. MDIO Timing when Sourced by STA

MDC

MDIO

10 ns

(Min)

10 ns

(Min)

Figure 37. MDIO Timing When Sourced by PHY

MDC

0 - 300 ns

MDIO

Table 40. MII Timing Parameters

Parameter

Sym

Min

Typ1

Max

Units

Test Conditions

MDIO setup before MDC

–

10

–

–

ns

When sourced by STA

MDIO hold after MDC

–

10

–

–

ns

When sourced by STA

MDC to MDIO output delay

–

0

27

300

ns

When sourced by PHY

1. Typical values are at 25° C and are for design aid only; not guaranteed and not subject to production testing.

Datasheet

61

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